SDSS J081648.70+041223.5

All names: Gaia DR2 3091630468840750592, Gaia DR3 3091630473138233984, Gaia EDR3 3091630473138233984, SDSS J081648.70+041223.5, WD 0814+043, GALEX J081648.7+041223, SDSS J081648.71+041223.5

Parameter Unit Gaia EDR3 SDSS DR12 Hardy et al. 2023a MWDD H Gaia DR2 Stilism Ferrario et al. 2015 Kulebi et al. 2009 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 16 48.71 (0.9) 08 16 48.71 08 16 48.71 (1) 08 16 48.71 08 16 48.71 (0.9) 08 16 48.71 08 16 48.89 08 16 48.71
Declination 04 12 23.47 (0.6) 04 12 23.54 04 12 23.47 (0.9) 04 12 23.51 04 12 23.55 (0.6) 04 12 23.54 04 12 17.28 04 12 23.53
Spectral type DAH DA DA DAH DAP DA_H: DA DAH DAH
Effective temperature [K] 12735.5 (433) 12678.0 11500.0 14000.0 (797) 12880.0 (912)
log(g) [cgs] 7.84 (0.2) 7.94 8.00 (0) 8.97 (0.04) 9.95 (0.06)
Mass [M] 0.5170034506119119 (0.2) 0.571
log(Luminosity) [L]
Cooling age [Gyr] 0.2953
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 1.26 (0.9) 1.64 (2) 1.26 (0.9)
Distance [pc] 790.66 (579) 610.52 (569) 790.64 (579)
Composition H H
Proper motion (right ascension) [mas/yr] -5.587306762 (0.9) -3.281845284 (2) -5.587 (0.9) 2.9
Proper motion (declination) [mas/yr] -5.004149259 (0.7) -7.788521662 (2) -5.004 (0.7) -22.9
Variability
Magnetic yes yes yes
Bd [MG] 10.325300128757902 10.13 (8) 10.13 (8)
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.73 (0.06) 20.73 (0.07) 20.74 (0.06) 20.73 20.74 (0.06)
g magnitude 20.39 (0.02) 20.39 (0.02) 20.40 (0.02) 20.39 20.39 (0.02)
r magnitude 20.51 (0.03) 20.52 (0.03) 20.52 (0.03) 20.51 20.51 (0.03)
i magnitude 20.62 (0.04) 20.62 (0.05) 20.63 (0.04) 20.62 20.62 (0.04)
z magnitude 21.14 (0.2) 21.10 (0.2) 21.11 (0.2) 21.10 21.11 (0.2)
G magnitude 20.43 (0.1) 20.51 20.43 (0.009)
BP magnitude 20.30 (0.1) 20.49
RP magnitude 20.01 (0.1) 20.22
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.025

* Constant surface field

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The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.